---
schema_version: "secwatch.filing_event.v1"
accession: "0000092122-25-000094"
form_type: "8-K"
ticker: "SO"
cik: "0000092122"
company_name: "SOUTHERN CO"
filed_at: "2025-11-06T23:59:59+00:00"
generated_at: "2026-05-17T00:08:32.833754+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Southern Company closes $2B corporate unit offering with 7.125% annual distribution

## Summary
- Issued 40M corporate units (after full over-allotment) at $50 per unit for total proceeds of $2.0B.
- Each unit includes stock purchase contract (buy SO common by Dec 2028 for $50) plus 1/40 interests in Series 2025B (due 2030) and 2025C (due 2033) remarketable senior notes.
- Total annual distribution rate of 7.125% (2.975% contract adjustment payments + 4.15% interest on RSNs).
- Underwriters included BofA Securities, J.P. Morgan Securities, Mizuho Securities USA.

## SEC filing metadata
- accession: 0000092122-25-000094
- form_type: 8-K
- ticker: SO
- cik: 0000092122
- company_name: SOUTHERN CO
- filed_at: 2025-11-06T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/92122/000009212225000094/0000092122-25-000094-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/92122/000009212225000094/so-20251103.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000092122-25-000094
- JSON: https://secwatch.observer/filing/0000092122-25-000094.json
- Plain text: https://secwatch.observer/filing/0000092122-25-000094.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.